Shelly Button1 disappeared from wifi and can't factory reset it !

^Hello,

I have a problem with a Shelly Button1.

It disappeared from wifi.

I tried to factory reset it but it didn't work.

Now when i push the reset button, i get weird led scenario : light blue blinking, fast light blue/dark blue blinking, dark blue/green blinking, light blue/dark blue/green blinking.

Don't know what to do...

Thanks.

Nothing ?

Really ?

Thanks for the answer.

I always use it powered by usb.

I tried to push it in all ways and nothing : never reconnected wifi or factory reset, just a multicolors flashes...